A retired Los Angeles Police Department (LAPD) cop claims that Grammy Award-winning artist Sean 'P Diddy' Combs was responsible for hiring a killer to shoot Tupac Shakur in a drive-by in 1996. Both Diddy, from New York, and Tupac, in Los Angeles, had been caught up in a bitter rivalry between East and West Coast rappers, the Huffington Post reports. According to the retired detective Greg Kading, who once led a special task force that investigated the shootings said Christopher Wallace, aka Biggies Smalls, a close friend to P Diddy was shot six months later in a revenge killing. Kading claims in a new documentary that Diddy hired Crips gang member Duane Keith 'Keffe D' Davis to kill Shakur and his manager Marion Hugh 'Suge' Knight for $1million. But on the night of the shooting, on September 7, 1996, it was actually Keffe's nephew Orlando 'Baby Lane' Anderson who shot the 25-year-old rapper dead, according to the ex-cop. Suge escaped unha